问题
I have a function which output some binary data to a stream. But the stream is abstract, which means the stream can be a file stream, or some other streams. But the stream must be a binary stream which support write-byte function. I searched but not found the answer.
What I want to do is, I have a function which will convert some data to a gif. But I donot want to output the data to a file, I want to output it to something in memory.
Thanks.
回答1:
The flexi-streams library provides, among other things, in-memory binary streams.
回答2:
"File in memory" - is just a byte array. So all you need is to read your data from stream and write it to one-dimensional array (vector). For more information on arrays in CL see this.
来源：https://stackoverflow.com/questions/7441992/how-to-create-a-binary-stream-not-a-file-in-common-lisp